Article(id=1304141627845530066, tenantId=1146029695717560320, journalId=1303687303576780880, issueId=1304141619603726817, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1009-3842.2026.01.008, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1744128000000, receivedDateStr=2025-04-09, revisedDate=1757606400000, revisedDateStr=2025-09-12, acceptedDate=null, acceptedDateStr=null, onlineDate=1788861193858, onlineDateStr=2026-09-08, pubDate=1772208000000, pubDateStr=2026-02-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1788861193858, onlineIssueDateStr=2026-09-08, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1788861193858, creator=13701087609, updateTime=1788861193858, updator=13701087609, issue=Issue{id=1304141619603726817, tenantId=1146029695717560320, journalId=1303687303576780880, year='2026', volume='', issue='1', pageStart='1', pageEnd='154', issueExtLink='null', onlineDate='null', pubDate='1772208000000', pubDateStr='2026-02-28', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1788861191893, creator='13701087609', updateTime=1788924965522, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1304409105645465969, tenantId=1146029695717560320, journalId=1303687303576780880, issueId=1304141619603726817, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1304409105645465970, tenantId=1146029695717560320, journalId=1303687303576780880, issueId=1304141619603726817, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=90, endPage=96, ext={EN=ArticleExt(id=1304141628088799699, articleId=1304141627845530066, tenantId=1146029695717560320, journalId=1303687303576780880, language=EN, title=Effect of Composite Diffusion Sources on Magnetic Properties of Sintered NdFeB Magnets, columnId=1304141568877814747, journalTitle=Copper Engineering, columnName=Material Preparation and Process Engineering, runingTitle=null, highlight=null, articleAbstract=

Grain boundary diffusion technology has emerged as a pivotal approach to overcome bottlenecks of high cost and significant remanence loss in traditional single-alloy methods by precisely regulating the distribution of heavy rare earths (HREs), thereby markedly enhancing the coercivity of NdFeB magnets. This study proposed composite diffusion sources formed by blending Tb-Al-Cu HRE alloys with pure Nd powder at varying ratios, systematically investigating their diffusion modification effects on both HRE-free and HRE-containing substrates. Experimental results demonstrated that under optimal diffusion source ratios, the maximum coercivity enhancements for the two substrates reached 1.036 T and 0.959 T, respectively, with remanence attenuation controlled within 0.59 kGs and 0.43 kGs. When TbAlCu-to-pure-Nd ratio was 3∶2 (for HRE-free substrates) or 2∶3 (for HRE-containing substrates), the magnets exhibited optimal comprehensive performance, achieving 48UH and 45EH grade levels, respectively. Microstructural analysis revealed that HRE-free substrates developed increased grain boundary phases, refined grains, and core-shell structures after diffusion, while HRE-containing substrates showed a significant increase in non-magnetic grain boundary phases. By designing composite diffusion sources, this study achieved remarkable magnetic performance improvements with low HRE consumption, offering a novel strategy for the green preparation and resource-efficient utilization of high-performance NdFeB magnets.

, authors=Hongxiong LIU, Zhiheng WANG, Yanfeng LIU, Jun CAO, Qiaobo LIU, Qiang HUANG, Jinjin YANG, Yixin CHEN, authorsList=Hongxiong LIU, Zhiheng WANG, Yanfeng LIU, Jun CAO, Qiaobo LIU, Qiang HUANG, Jinjin YANG, Yixin CHEN, authorCompany=null, correspAuthors=null, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1304141628445315540, articleId=1304141627845530066, tenantId=1146029695717560320, journalId=1303687303576780880, language=CN, title=Tb-Al-Cu/Nd复合扩散源对烧结钕铁硼磁性能的影响, columnId=1304141569037198301, journalTitle=铜业工程, columnName=材料制备与加工工程, runingTitle=null, highlight=null, articleAbstract=

晶界扩散技术可以通过调控重稀土元素分布，显著提升钕铁硼磁体的矫顽力，是突破传统单合金法高成本、高剩磁损耗瓶颈的关键手段。本文提出以重稀土合金Tb-Al-Cu与纯钕粉按不同比例混合形成复合扩散源，系统研究了其对无重稀土基材与含重稀土基材的扩散效果。实验结果表明，在最佳比例扩散源下，两类基材最高矫顽力分别提升1.036 T与0.959 T，剩磁衰减量分别控制在0.59 kGs与0.43 kGs以内。当Tb-Al-Cu与纯钕粉质量比为3∶2（无重稀土基材）和2∶3（含重稀土基材）时，磁体综合性能最优，分别达到48UH与45EH牌号水平。微观分析表明，无重稀土基材扩散后晶界相增多并形成核壳结构，而含重稀土基材扩散后非磁晶界相明显增多。本研究通过复合扩散源设计，实现了低重稀土用量下磁性能的显著提升，为高性能钕铁硼的绿色制备与资源高效利用提供了新策略。

, authors=刘宏雄, 王志恒, 刘延丰, 曹俊, 刘乔波, 黄强, 杨金金, 陈奕欣, authorsList=刘宏雄, 王志恒, 刘延丰, 曹俊, 刘乔波, 黄强, 杨金金, 陈奕欣, authorCompany=null, correspAuthors=null, authorNote=, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=Ft+sOtqfNnRzE+JLW8GxEA==, magXml=2HC+VMNnQmPWrl5Xn+pvcQ==, pdfUrl=null, pdf=UuykUkeYU0OUO24zkJoIzg==, pdfFileSize=9381467, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=z2ziem1yer+Z2v4Et4yu1A==, mapNumber=null, fund=null)}, authors=[Author(id=1304141628780859865, tenantId=1146029695717560320, journalId=1303687303576780880, articleId=1304141627845530066, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=13621357626@163.com, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1304141628881523163, tenantId=1146029695717560320, journalId=1303687303576780880, articleId=1304141627845530066, authorId=1304141628780859865, language=EN, stringName=Hongxiong LIU, firstName=Hongxiong, middleName=null, lastName=LIU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=Jiangxi Copper Technology Institute Co.，Ltd.，Nanchang 330096，China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1304141628982186461, tenantId=1146029695717560320, journalId=1303687303576780880, articleId=1304141627845530066, authorId=1304141628780859865, language=CN, stringName=刘宏雄, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=null, address=江西铜业技术研究院有限公司，江西 南昌 330096, bio={"content":"

刘宏雄（1997—），男，甘肃天水人，博士，工程师，研究方向：稀土永磁，E-mail：13621357626@163.com

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刘宏雄（1997—），男，甘肃天水人，博士，工程师，研究方向：稀土永磁，E-mail：13621357626@163.com

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